3 places where TCLFSENCODING is not appropricate (use system-encoding… #3846

Job	Run time
gcc	16m 40s
gcc (CFLAGS=-DTCL_NO_DEPRECATED=1)	15m 13s
msvc	11m 10s
gcc (--disable-shared)	17m 31s
msvc (CHECKS=nodep)	14m 48s
gcc (--enable-symbols)	15m 48s
msvc (OPTS=static)	11m 30s
gcc (--enable-symbols=mem)	20m 37s
msvc (OPTS=symbols)	13m 14s
gcc (--enable-symbols=all)	17m 57s
msvc (OPTS=symbols STATS=compdbg,memdbg)	15m 1s
	2h 49m 29s

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